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1. Spin relaxation induced by interfacial effects in n-GaN/MgO/Co spin injectors

Author:
Liu, Xingchen; Tang, Ning; Fang, Chi; Wan, Caihua; Zhang, Shixiong; Zhang, Xiaoyue; Guan, Hongming; Zhang, Yunfan; Qian, Xuan; Ji, Yang; Ge, Weikun; Han, Xiufeng; Shen, Bo
Source:
RSC advances 2020 v.10 no.21 pp. 12547-12553
ISSN:
2046-2069
Subject:
magnesium oxide,   etc   ; cobalt; injectors; temperature;     Show all 4 Subjects
Abstract:
... Spin relaxation, affected by interfacial effects, is a critical process for electrical spin injection and transport in semiconductor-based spintronics. In this work, the electrical spin injection into n-GaN via n-GaN/MgO/Co tunnel barrier was realized, and the interface-related spin relaxation was investigated by both electrical Hanle effect measurement and time-resolved Kerr rotation (TRKR) spect ...
DOI:
10.1039/d0ra00464b

2. Polypropylene fiber reinforced Alker as a structurally stable and sustainable building material

Author:
Onochie, Kenechi Kurtis; Balkis, Ayse Pekrioglu
Source:
Journal of cleaner production 2021 v.279 pp. 123600
ISSN:
0959-6526
Subject:
magnesium oxide,   etc   ; Fourier transform infrared spectroscopy; X-ray diffraction; chemical composition; clay; computer software; computer techniques; construction materials; cracking; drying; gypsum; mechanical properties; polypropylenes; scanning electron microscopes; shrinkage; soil; wastes; Cyprus;     Show all 18 Subjects
Abstract:
... Alker is a technology which utilizes the use of 8–10% clay in gypsum stabilized earthen materials in earthen construction. Earthen construction has gained prominence in recent times as a result of its ease in construction, environmental friendliness and availability meeting the housing needs prevalent in most countries with a growing population including North Cyprus. Wastes such as gypsum and pol ...
DOI:
10.1016/j.jclepro.2020.123600

3. Preparation and characterization of high damage-tolerance nacre-inspired magnesium alloy matrix composites with high carbon nanotube contents

Author:
Sun, Xun; Guo, Rui-Fen; Shaga, Alateng; Hu, Zhi-Jie; Shen, Ping; Zhang, Zhi-Qiang; Jiang, Qi-Chuan
Source:
Carbon 2020 v.162 pp. 382-391
ISSN:
0008-6223
Subject:
magnesium oxide,   etc   ; alloys; carbon nanotubes; magnesium; pressing; silica;     Show all 6 Subjects
Abstract:
... A nacre-like magnesium matrix composite with high carbon nanotube (CNT) contents (up to 4.40 wt%) was successfully prepared under the combined effects of bidirectional freeze casting, pressureless infiltration, and hot pressing. The bidirectional freeze casting was carried out to fabricate large-scale parallelly layered CNT scaffolds. The spontaneous infiltration of an AZ91 magnesium alloy was ach ...
DOI:
10.1016/j.carbon.2020.02.072

4. Improved Figure of Merit of Cu₂SnSe₃ via Band Structure Modification and Energy-Dependent Carrier Scattering

Author:
Ming, Hongwei; Zhu, Chen; Qin, Xiaoying; Zhang, Jian; Li, Di; Zhang, Baoli; Chen, Tao; Li, Jimin; Lou, Xunuo; Xin, Hongxin
Source:
ACS applied materials & interfaces 2020 v.12 no.17 pp. 19693-19700
ISSN:
1944-8252
Subject:
magnesium oxide,   etc   ; iron; nanoparticles; selenides; thermal conductivity; tin;     Show all 6 Subjects
Abstract:
... As an ecofriendly thermoelectric material with intrinsic low thermal conductivity, ternary diamond-like Cu₂SnSe₃ (CSS) has attracted much attention. Nevertheless, its figure of merit, ZT, is limited by its small thermopower (S) and power factor (PF). Here, we show that an increase in thermopower by 63% and a carrier-mobility rise of 81% at 300 K can be simultaneously achieved through 5% substituti ...
DOI:
10.1021/acsami.0c04298

5. Interface Oxygen Induced Internal Structures of Ultrathin MgO Islands Grown on Ag(100)

Author:
Savio, Letizia; Smerieri, Marco; Vattuone, Luca; Tosoni, Sergio; Pacchioni, Gianfranco; Rocca, Mario
Source:
Journal of physical chemistry 2020 v.124 no.16 pp. 8834-8842
ISSN:
1932-7455
Subject:
magnesium oxide,   etc   ; oxygen; physical chemistry; scanning tunneling microscopy; silver;     Show all 5 Subjects
Abstract:
... When imaged by scanning tunneling microscopy (STM) at constant current under nontopographic conditions, nanosized MgO islands grown on Ag(100) may show a fractal dark internal structure and/or appear embedded in the surface. On the contrary, when imaged under topographic conditions, the same islands appear as nearly flat plateaus. Islands showing different contrast and a different contrast depende ...
DOI:
10.1021/acs.jpcc.0c01248

6. Accelerated carbonation of reactive magnesium oxide cement (RMC)-based composite with supercritical carbon dioxide (scCO2)

Author:
Hay, Rotana; Celik, Kemal
Source:
Journal of cleaner production 2020 v.248 pp. 119282
ISSN:
0959-6526
Subject:
magnesium oxide,   etc   ; carbon dioxide; carbon sequestration; carbonates; carbonation; cement; magnesium;     Show all 7 Subjects
Abstract:
... Reactive magnesium oxide cement (RMC) has the potential to become a sustainable alternative to ordinary Portland cement (OPC). In this study, an approach utilizing supercritical CO₂ (scCO₂) was investigated to accelerate carbonation of an RMC-based composite and to overcome its long carbonation process under the natural environment. It was found that scCO₂ led to an extremely rapid strength gain o ...
DOI:
10.1016/j.jclepro.2019.119282

7. Carbonated binder systems containing reactive MgO and Portland cement: Strength, chemical composition and pore structure

Author:
Zhang, Runxiao; Panesar, Daman K.
Source:
Journal of cleaner production 2020 v.271 pp. 122021
ISSN:
0959-6526
Subject:
magnesium oxide,   etc   ; carbon dioxide; carbonation; cement; chemical composition; compression strength; mechanical properties; microstructure; porosity;     Show all 9 Subjects
Abstract:
... A sustainable binder system with a capacity to mineralize CO₂ can be formulated by reactive MgO and Portland cement (PC). This research studies the properties of mortar specimens made with carbonated MgO-PC systems with a MgO substitution range of 0%–100% in order to evaluate and compare the compressive strength, chemical composition and pore structure. Key results indicate that the carbonation fr ...
DOI:
10.1016/j.jclepro.2020.122021

8. Experimental study of MgO/Mg(OH)2 thermochemical heat storage with direct heat transfer mode

Author:
Yan, J.; Pan, Z.H.; Zhao, C.Y.
Source:
Applied energy 2020 v.275 pp. 115356
ISSN:
0306-2619
Subject:
magnesium oxide,   etc   ; chemical reactions; energy density; heat exchangers; heat transfer; magnesium hydroxide; temperature; thermal energy;     Show all 8 Subjects
Abstract:
... Thermochemical heat storage uses a reversible chemical reaction to store thermal energy. This thermal energy storage method has high energy density and allows long-term thermal energy storage. MgO/Mg(OH)₂ is a promising reversible reaction for thermochemical heat storage systems. The performance of this reversible reaction inside a reactor plays a key role in its practical applications. The direct ...
DOI:
10.1016/j.apenergy.2020.115356

9. Effect of particle size on magnesite flotation based on kinetic studies and machine learning simulation

Author:
Fu, Yafeng; Yang, Bin; Ma, Yingqiang; Sun, Qianyu; Yao, Jin; Fu, Wenbiao; Yin, Wanzhong
Source:
Powder technology 2020 v.376 pp. 486-495
ISSN:
0032-5910
Subject:
magnesium oxide,   etc   ; artificial intelligence; kinetics; magnesite; models; particle size; prediction; silica;     Show all 8 Subjects
Abstract:
... This research focused on the effect of particle size and flotation time on magnesite flotation, and the flotation performance of various size fractions were predicted by a machine learning (ML) method. Four kinetic models were used to fit the recovery of MgO and SiO₂ in various size fractions of magnesite flotation. The results demonstrated that the flotation of magnesite exhibits good agreement w ...
DOI:
10.1016/j.powtec.2020.08.054

10. Experimental study of fire resistant board configurations under standard fire conditions

Author:
Steau, Edward; Mahendran, Mahen; Poologanathan, Keerthan
Source:
Fire safety journal 2020 v.116 pp. 103153
ISSN:
0379-7112
Subject:
magnesium oxide,   etc   ; calcium silicate; fire resistance; fire testing; gypsum; gypsum board; heat transfer; insulating materials; steel;     Show all 9 Subjects
Abstract:
... Cold-formed Light gauge Steel Frame (LSF) floor-ceiling systems are commonly made with non-combustible fire protective membrane to protect the steel floor joists in fire. Thermal improvements to the fire protective membrane delay the heat transfer to structural elements and provide enhanced fire resistance level. Hence, this study addresses the thermal performance of different fire resistant board ...
DOI:
10.1016/j.firesaf.2020.103153

11. Experimental study of nanofluids flow and heat transfer over a backward-facing step channel

Author:
Hilo, Ali Kareem; Talib, Abd Rahim Abu; Iborra, Antonio Acosta; Sultan, Mohammed Thariq Hameed; Hamid, Mohd Faisal Abdul
Source:
Powder technology 2020 v.372 pp. 497-505
ISSN:
0032-5910
Subject:
magnesium oxide,   etc   ; Reynolds number; convection; cupric oxide; ethylene glycol; friction; nanofluids; nanoparticles;     Show all 8 Subjects
Abstract:
... The forced convective heat transfer and friction factor of nanofluids flow over a backward-facing step (BFS) in a channel with the base wall dissipating a uniform heat flux are experimentally investigated in this paper. Nanoparticles such as CuO and MgO dispersed in pure ethylene glycol (EG) with average diameters of 40 nm, and volume concentrations of 0, 1, 3, and 5% are considered as the working ...
DOI:
10.1016/j.powtec.2020.06.013

12. Novel NiCl₂ Nanosheets Synthesized via Chemical Vapor Deposition with High Specific Energy for Thermal Battery

Author:
Luo, Zeshunji; Lin, Xiaoxia; Tang, Licheng; Feng, Yong; Gui, Yufan; Zhu, Jiajun; Yang, Wulin; Li, Deyi; Zhou, Lingping; Fu, Licai
Source:
ACS applied materials & interfaces 2020 v.12 no.31 pp. 34755-34762
ISSN:
1944-8252
Subject:
magnesium oxide,   etc   ; adsorption; batteries; cathodes; electrolytes; energy conversion; lithium; nanosheets; redox reactions; specific energy; temperature; vapors;     Show all 12 Subjects
Abstract:
... Two-dimensional (2D) nanomaterials possessing a unique sheet structure, compared to correlative bulk materials, exhibit excellent properties, especially in the energy storage and energy conversion field. In this case, NiCl₂ nanosheets with thicknesses of 2–8 nm are first prepared by a simple chemical vapor deposition method. For the Li–B/LiF–LiCl–LiBr/NiCl₂ thermal battery, the specific energy of ...
DOI:
10.1021/acsami.0c05751

13. The application of 1,3,5-trinitrobenzene as a spin probe for the surface basic sites study of MgAl double oxides by EPR spectroscopy

Author:
Yurpalov, Vyacheslav L.; Stepanova, Liudmila N.; Drozdov, Vladimir A.; Belskaya, Olga B.
Source:
Colloids and surfaces 2020 v.596 pp. 124733
ISSN:
0927-7757
Subject:
magnesium oxide,   etc   ; adsorption; aluminum; anions; carbon dioxide; electron paramagnetic resonance spectroscopy; hexane; magnesium; solvents; toluene;     Show all 10 Subjects
Abstract:
... In current work the features of 1,3,5-trinitrobenzene (TNB) transformation into paramagnetic products on the surface of aluminum/magnesium oxides calcined at 550°C, as well as MgAl double oxides, were investigated by EPR spectroscopy. It was shown that the increase of basicity (i.e. MgO content) leads to the increase in the concentration of formed radical anions, wherein the presence of acidic sit ...
DOI:
10.1016/j.colsurfa.2020.124733

14. Advanced High-Temperature CO₂ Sorbents with Improved Long-Term Cycling Stability

Author:
Nityashree, N.; Manohara, G. V.; Maroto-Valer, M. Mercedes; Garcia, S.
Source:
ACS applied materials & interfaces 2020 v.12 no.30 pp. 33765-33774
ISSN:
1944-8252
Subject:
magnesium oxide,   etc   ; atmospheric pressure; calcium oxide; carbon; carbon dioxide; carbonation; limestone; sorbents;     Show all 8 Subjects
Abstract:
... Developing novel sorbents with maximum carbonation efficiency and good cycling stability for CO₂ capture is a promising route to sequester anthropogenic CO₂. In this work, we have employed a green synthesis method to synthesize CaO-based sorbents suitably stabilized by MgO and supported by in situ generated carbon under inert atmosphere. The varied amounts (10–30 wt %) of MgO were used to stabiliz ...
DOI:
10.1021/acsami.0c08652

15. Use of neural network to analyze the kinetics of CO2 absorption in Li4SiO4/MgO composites from TG experimental data

Author:
Vieira, Sara S.; Paz, Gilvan M.; Araujo, Bárbara C.R.; Lago, Rochel M.; Sebastião, Rita C.O.
Source:
Thermochimica acta 2020 v.689 pp. 178628
ISSN:
0040-6031
Subject:
magnesium oxide,   etc   ; absorption; carbon dioxide; kinetics; lithium silicates; models; phase transition; serpentinite; temperature;     Show all 9 Subjects
Abstract:
... In this work, it was studied the kinetics of CO₂ absorption process in the composite Li₄SiO₄/MgO at 400, 500, 600 and 700 °C. The composite Li₄SiO₄/MgO, prepared from a natural available mineral serpentinite Mg₃Si₂O₅(OH)₄ showed absorption capacity of ca. 24 wt.%. Based on the isothermal TG data, the CO₂ absorption kinetic was initially investigated using geometrical contraction models, diffusion ...
DOI:
10.1016/j.tca.2020.178628

16. Highly effective antibacterial activity of lithium-doped magnesium oxide particles synthesized by the microwave-assisted hydrothermal route

Author:
Tian, Qizhe; Ye, Junwei; Yuan, Wenjie; Zhang, Siqi; Shi, Lei; Zhong, Jianchu; Ning, Guiling
Source:
Powder technology 2020 v.371 pp. 130-141
ISSN:
0032-5910
Subject:
magnesium oxide,   etc   ; Escherichia coli; Staphylococcus aureus; antibacterial properties; guidelines; lithium; microwave treatment; minimum inhibitory concentration; nanocrystals;     Show all 9 Subjects
Abstract:
... Nanocrystalline magnesium oxide with different lithium doping molar contents were prepared by a microwave-assisted hydrothermal route to improve their antibacterial activity. The as-prepared MgO and Li-doped MgO possess the co-existing structure of nanometer flakes and nanometer particles with the diameter ranged from 50 to 150 nm. The antibacterial effect of Li-doped MgO against Escherichia coli ...
DOI:
10.1016/j.powtec.2020.05.031

17. Transparent glass-ceramics for thermal management application: achievement of optical transparency and high thermal conductivity

Author:
Terakado, Nobuaki; Yoshimine, Toshikazu; Kozawa, Ryusei; Takahashi, Yoshihiro; Fujiwara, Takumi
Source:
RSC advances 2020 v.10 no.38 pp. 22352-22360
ISSN:
2046-2069
Subject:
magnesium oxide,   etc   ; glass; glass transition; heat transfer; melting; nuclear magnetic resonance spectroscopy; polymers; thermal conductivity;     Show all 8 Subjects
Abstract:
... Oxide glass is an industrial material with advantages such as optical transparency and shaping ability of the melt, but at the same time, it is a bad conductor of heat due to its disordered structures. Therefore, heat dissipation in glass components often becomes a problem and its applications to the thermal management has been limited to use as a heat insulator. To break this mold and to apply it ...
DOI:
10.1039/d0ra03026k

18. Study of MgO-activated slag as a cementless material for sustainable spray-based 3D printing

Author:
Lu, Bing; Zhu, Weiping; Weng, Yiwei; Liu, Zhixin; Yang, En-Hua; Leong, Kah Fai; Tan, Ming Jen; Wong, Teck Neng; Qian, Shunzhi
Source:
Journal of cleaner production 2020 v.258 pp. 120671
ISSN:
0959-6526
Subject:
magnesium oxide,   etc   ; Fourier transform infrared spectroscopy; automation; concrete; fly ash; rheology; slags; three-dimensional printing; viscosity;     Show all 9 Subjects
Abstract:
... 3D concrete printing technology greatly facilitates automation in construction which enhances efficiency, productivity and sustainability. This study develops a slag-based mixture as a cementless material for sustainable spray-based 3D printing. Effects of MgO and fly ash cenosphere (FAC) addition on setting, hydration and rheological properties of fresh mixtures are investigated to obtain the opt ...
DOI:
10.1016/j.jclepro.2020.120671

19. Magnesium oxide anchored into a hollow carbon sphere realizes synergistic adsorption and activation of CO₂ for electrochemical reduction

Author:
Li, Congxin; Ni, Wei; Zang, Xiaogang; Wang, Huaizhi; Zhou, Yixiang; Yang, Zhiyu; Yan, Yi-Ming
Source:
Chemical communications 2020 v.56 no.45 pp. 6062-6065
ISSN:
1364-548X
Subject:
magnesium oxide,   etc   ; adsorption; carbon; carbon dioxide; carbon monoxide; catalysts; chemical reactions; electrochemistry; electrolytes;     Show all 9 Subjects
Abstract:
... We report the synergistic adsorption and activation of CO₂ by using magnesium oxide anchored into a hollow carbon sphere (MgO/HCS) as an efficient catalyst for electrochemical reduction of CO₂ (ERC). The MgO/HCS catalyst exhibits a high selectivity for CO production with a faradaic efficiency of 81.7% at −1.0 V vs. RHE and a partial current density (PCD) of 16.7 mA cm⁻² in aqueous electrolyte. ...
DOI:
10.1039/d0cc00929f

20. Effect of the specific surface area of MgO on the treatment of boron and fluorine

Author:
Kameda, Tomohito; Yamamoto, Yusuke; Kumagai, Shogo; Yoshioka, Toshiaki
Source:
Applied water science 2020 v.10 no.5 pp. 104
ISSN:
2190-5487
Subject:
magnesium oxide,   etc   ; absorbents; boron; fluorine; ions; landfill leachates; surface area; temperature; wastewater; wastewater treatment;     Show all 10 Subjects
Abstract:
... To realize improved wastewater treatment processes, the study investigated the processing of boron and fluorine and the processing of real landfill leachate using MgO with different specific surface areas. By optimizing the MgO absorbent, the time required for boron and fluorine processing can be reduced dramatically and uniform wastewater quality standards can be achieved. The rate constants for ...
DOI:
10.1007/s13201-020-01198-z